Correlation properties of heart rate variability to assess the first ventilatory threshold and fatigue in runners.

• Tác giả: Bart C Bongers, Thomas Gronwald, Bram Mennen, Bruce Rogers, Bas Van Hooren
• Ngôn ngữ: eng
• Ký hiệu phân loại: 331.21647 Conditions of employment
• Thông tin xuất bản: England : Journal of sports sciences , 2025
• Bộ sưu tập: NCBI
• ID: 687829

Tóm tắt

PURPOSE: The short-term scaling exponent alpha1 of detrended fluctuation analysis (DFA-a1) of heart rate variability (HRV) has shown potential to delineate the first ventilatory threshold (VT1). The aims of this study were to investigate the accuracy of this method for VT1 determination in runners using a consumer grade chest belt and to explore the effects of acute fatigue. METHODS: We compared oxygen uptake ( RESULTS: Bland-Altman analysis between gas exchange and HRV CONCLUSION: A chest-belt derived DFA-a1 of 0.75 is closely related to gas exchange VT1, with the variability in accuracy at an individual level being similar to gas exchange methods. This suggests this to be a useful method for exercise intensity demarcation. The altered relationship during the second ramp indicates that DFA-a1 is only able to accurately demarcate exercise intensity thresholds in a non-fatigued state, but also opens opportunities for fatigue-based training prescription.